Mitsubishi 380. Instruction - page 41
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-161
INSPECTION PROCEDURE D-2: Power Window: The power window timer function does not work
normally.
NOTE: This troubleshooting procedure requires use
of diagnostic tool MB991958 and SWS monitor kit
MB991813. For details on how to use the SWS mon-
itor, refer to "How to connect SWS monitor
."
.
CIRCUIT OPERATION
The ETACS-ECU operates the power window timer
function according to the following signals:
• Ignition switch (IG1)
• Front door switch
.
TECHNICAL DESCRIPTION (COMMENT)
If the power window timer function does not work
normally, its input circuit, the ETACS-ECU or the
front-ECU may be defective.
.
TROUBLESHOOTING HINTS
• Refer to circuit diagrams GROUP-
90
• Refer to configuration diagrams GROUP-
80
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
• The ETACS-ECU may be defective
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-162
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991958: diagnostic tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991910: MUT-III Main Harness A
• MB991813: SWS Monitor Kit
• MB991806: SWS Monitor Cartridge
• MB991812: SWS Monitor Harness (For Column-ECU)
• MB991822: Test Probe Harness
STEP 1. Use diagnostic tool MB991958 to select "ECU
COMM Check" on the SWS monitor display.
Check the ETACS-ECU.
CAUTION
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958. Connect special tool MB991910 before con-
necting special tool MB991812. Be sure to connect special
tool MB991806 after turning on special tool MB991824.
(1) Connect the special tool. Refer to "How to connect SWS
monitor
P.54B-13
."
(2) Turn the ignition switch to the "ON" position.
(3) Operate the diagnostic tool MB991958 according to the
procedure below to display "ECU COMM Check."
a. Select "Interactive Diagnosis."
b. Select "System Select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "ECU COMM Check."
(4) diagnostic tool MB991958 should show "OK" on the "ECU
COMM Check" menu for the "ETACS ECU" menu.
Q: Is "OK" displayed for the "ETACS ECU" menu?
YES : Go to Step 2.
NO : Refer to Inspection Procedure A-3 "Communication
with the ETACS-ECU is not possible
P.54B-74
."
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
COLUMN SWITCH
CONNECTOR
COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE
MB991812
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-163
STEP 2. Check the input signal by using "DATA LIST"
menu of the SWS monitor.
Turn the ignition switch to the "ON" position before checking
input signals from the ignition switch (IG1).
(1) Operate diagnostic tool MB991958 according to the
procedure below to display "ETACS ECU."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Data List."
f.
Select "ETACS ECU."
(2) Check that normal conditions are displayed for the items
described in the table below.
Q: Does the diagnostic tool MB991958 display the items
"IG SW (IG1)", "FRONT DOOR SW" as normal
condition?
Normal condition displayed for all the items : Replace
the ETACS-ECU. Verify that the power window timer
works normally.
Normal condition is not displayed for "IG SW (IG1)" :
Refer to Inspection Procedure M-2 "ETACS-ECU
does not receive any signal from the ignition switch
(IG1)
P.54B-408
."
Normal condition is not displayed for "FRONT DOOR
SW" : Refer to Inspection Procedure M-4 "ETACS-ECU
does not receive any signal from the front door
switches
P.54B-413
."
ITEM NO.
ITEM NAME
NORMAL CONDITION
ITEM 30
IG SW (IG1)
OFF
ITEM 32
FRONT DOOR SW
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AC302210
COLUMN SWITCH
CONNECTOR
COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE
MB991812
AB
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-164
INSPECTION PROCEDURE D-3: Power Window: Only the front door window (RH) does not work by
operating power window main switch.
.
CIRCUIT OPERATION
The front power window regulator motor (RH) lower
or raises the door window (RH) when the power win-
dow main switch is moved to "UP" or "DOWN" posi-
tion.
.
TECHNICAL DESCRIPTION (COMMENT)
The power window main switch or the front power
window regulator motor (RH) may be defective.
.
TROUBLESHOOTING HINTS
• Refer to circuit diagrams GROUP-
90
• Refer to configuration diagrams GROUP-
80
• The power window main switch may be defective
• The front power window regulator motor (RH)
may be defective
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
.
16DB334A
CONNECTORS:E-04,E-03
E-04
E-03(GR)